Cold Chain

Every lot is stored at −4°F from arrival to fulfillment. Not “cool”. Not “refrigerated”. Cryogenically stable freezer storage from the moment we accept the lot to the moment it leaves our door.

• −4°F freezer storage temperature
• 24/7 temperature-logged, alarmed
• 100% lyophilized before storage
• 36 months stability at −4°F (lyophilized)

Why cold matters

Peptides are chains of amino acids linked by peptide bonds. Those bonds are hydrolyzed by water, oxidized by oxygen, and rearranged by heat. A vial sitting at room temperature is measurably less pure a month later than the day it left QA. A vial at −4°F, lyophilized, in the dark, in an inert-purged vial — that's the arrest.

Vendors that say “no cold chain required” are describing the vial's tolerance for warm transit — not the ideal condition for the material inside. Tolerance is not preservation.

The chain, step by step

1. Synthesis → lyophilization. Peptide is produced, purified by RP-HPLC, characterized, and freeze-dried into a stable amorphous cake. Water removed to under 5% by Karl Fischer.
2. Cold transport to us. Bulk arrives on gel-pack or dry ice depending on distance. Each shipment is temperature-logged and rejected if the log shows an excursion above 5°F for more than 4 hours.
3. Quarantine → QC → release. New lots go straight to −4°F under quarantine hold. Only after the analytical panel passes does the lot get released into sellable inventory. See the COA lookup.
4. Freezer storage, 24/7 monitored. Dedicated pharmaceutical-grade freezers at −4°F ± 4°F, continuous temperature loggers with SMS alarm on any excursion, backup power. No mixed use.
5. Pull-and-pack, same day. Orders placed before 3 PM PT pull the vial from −4°F, wrap it in bubble wrap inside a padded mailer, and hand off to the carrier the same afternoon. Room-temperature exposure during pack: under 15 minutes.
6. Transit → you. Lyophilized peptides are shelf-stable for the length of transit. On arrival, transfer to your own freezer (or a 36–46°F refrigerator for short-term). See Storage & Handling.

Our cold-chain SOP in one page

Storage

• All released lots: −4°F ± 4°F
• Freezers: pharmaceutical-grade, calibrated quarterly
• Continuous logging + SMS alarm on excursion
• UPS backup on power circuit
• No mixed use — dedicated peptide freezers only

Handling

• Vials handled with gloved hands only
• Under 15 minutes room-temperature exposure per pull
• No thaw-refreeze on stored inventory
• Lot pull recorded with time-in / time-out

Packaging

• Bubble-wrap cushioning inside a padded mailer
• Discreet outer box, unbranded
• Tamper-evident seal on vial box

Excursion protocol

• Alarm fires → on-call responds within 30 minutes
• Lot pulled and moved to a backup unit
• Root cause logged
• Affected lots re-tested if the excursion exceeds 4 hours above 5°F

When you receive your order

• Unbox on arrival. Don't leave the mailer on a porch or in a hallway.
• Inspect the packaging. The outer box and mailer should be intact. Photograph any damage before opening and contact us within 48 hours.
• Transfer to cold storage promptly and keep materials in their original, labelled containers.

All products are supplied for laboratory research use only. Not for human or veterinary consumption.